|  | 2.1 | Various LAN Communication Problems
| 2.1.7 | The benefit of using repeaters
The distance that a LAN can cover is limited due to attenuation; attenuation means that the signal weakens (that is, attenuates) as it travels through the network. Attenuation is caused by the resistance in the cable, or medium. An Ethernet repeater is a physical-layer device on the network that boosts or regenerates the signal on an Ethernet LAN. When you use an Ethernet repeater to extend the distance of a LAN, a single network can cover a greater distance and more users can share that same network, as shown. However, using repeaters and multiport repeaters, known as hubs, compounds the issue of broadcasts and collisions and has a negative effect on the overall performance of the shared-media LAN.
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